Rotary motor.



Y N0..709,254. Patented sept. le, 902.

. A. L. EcHT.

ROTARY MUTUR.

Appl t nldJ n 13 1901) 2 Sheets-'Sheet I..

, (No Model.)

NITE

ALBERT LOUIS BECI-IT, OF PARIS, FRANCE.

ROTARY MOTOR.

` SFEGIFIGATIONforming part of Letters Patent No. 709,254, dated September 16, 11902.

` Application ne@ June 13,1901. serial No. 64,355. (No moan.)

.To tu .whom it may concern:

Beit known that I, ALBERT Louls BECHT, a

citizen vof the French Republic, residing in l may be reversed.

The arrangement of the motor is such that connection between the rotating driving-piston and the drum which forms a tight joint with it is insured and also with the rotating slide-valves. `In addition to this special provision is made in order to insure the greatest possible degree of hermeticity in thejoints between the rotating parts and the lixed walls of the cylinder.

My improved motor is capable of several modifications in constructional detail, and I will `now describe several constructional forms by Way of example, with reference to the accompanying drawings.

Figures l and 2 represent my inotorin crosssection and in longitudinal section, respectively. Figs. 3 and 4 are sectional views similar, respectively, to Figs. l and 2, but illustratingaslightly-modified construction. Figs. 5 and o' are sectional views also similar, respectively, to Figs. l and2, but illustrating anotherslightly-modiedconstruction. Fig. 'is a sectional view illustrating a modification wherein two oppositely-disposed distributing-valves are employed.

The motor hasa cylinder A, in which is rotatively mounted a shaft C, having bearings at a and b. On this shaft is secured a drum B. The-rotating drum B is provided externally and parallel with its axis with two longitudinal projecting portions c, which are applied against the inner wall of the fixed cylinder A. The drum B is provided with teeth d upon the whole of its circumference in order that it may mesh with a second drum or cylinder D, the diameter of which is one-half that of the drum B. This drum D is also provided with peripheral teeth e and is rigidly fixed upon the shaft E, from which the distributinggear is operated. In the entire length ot' this cylinderD is formed a recessf, serving to permit of the passage of the projections c. The

said recessfand projections c do not extend for the whole length of the respective drums,

a-nd cylindrical portions are left at the two extremities, and these cylindrical portions enter lateral recesses. The teeth are formed around the entire circumference of the drums, and in this manner constant contact between the drum B and the cylinder D is insured. The diameter of the drum D being one-half that of the drum B, the ratio of the number ofteeth is consequentlyin the same proportion. The ratio of the diameters of the drums B and D may be modied according to the number of projections provided upon the drum B and the recesses formed in the drum D. A modification of this kind is illustrated in Figs. 3 and 4, in which the shafts G and E are connected by means of gear-wheels of the same diameter. In this case the drum Bis provided with two projections c and the drum D with two recessesf. The drums B and D, instead of being connected by means of internal gearwheels d c, may be connected by the pinion F and 'the gear-wheel G rigidly fixed outside upon the shafts E and C, as shown in Figs. 3 and 4. In these figures the two gear-wheels F G are of the same diameter. They are in the ratio of one to two in the arrangement shown in Figs. 5 and 6.

The distributing-gear consists for each direction of rotation of a cock or valve H, to which is imparted a movement of rotation around its axis by means of a toothed wheel g, gearing with a wheel h, which is rigidly fixed upon the shaft E of the cylinder D. This valve H is pierced transversely with a certain number of conduits t, which at certain points in the rotation are in communication with the admission-orifices]` to the admission to the cylinder with orifices 7o, terminating in the chamber l, into which the pipe m for the admission of the motive fluid opens.

Two distributing-cylinders are provided for my motor, so that one or other of these cylinders being operative in accordance with the direction in which it is desired that the motor should rotate. Each of the pipes nis provided with a non-return valve o. This valve is not indispensable; but it serves to prevent the backliow of the motive liuid to the inlet or supply pipe in case the pressure in the latter should be reduced below that beyond the valve.

IOO

The lubricant is introduced at p into a small cup, from which three conduits proceed. These lead to the drum D and to the two distributing-valves H.

The motive fluid enters by one or other of the admission-pipes m one of the cocks H and the conduitsey into the space r, formed by the Walls of the fixed cylinder A, the outer wall of the drum B, the surface of the drum D, and one of the walls of a projection c. By virtue of its elastic force the fluid tends to push the projection c in the direction of the arrow and.communicates to thedrum itself a movement'of rotation. At a given point in the travel of' the piston c the admission of the motive fluid is cut off, after which only the effect of the expansion of the fluid is utilized for producing further movement of rotation of the drum B. When the piston c reaches the recess K, the fluid contained in the space or chamber r escapes. lIt is thus obvious that each time one of the pistons@ passes beyond an orifice for the admission of the motive fluid this piston is submitted to the pressure of the fluid-that is to say, for each piston c there are produced two driving periods per revolution. l

Fig. 7 represents a modification in which the two rotary distributing-valves are diametrically opposite. Themovement of rotation then always takes place in the same direction. lt cannot be altered. With this arrangement there are four admissions per revo'- lution.

The driving-cylinder A is surrounded by an envelop I, which forms a space J, in which steam may be caused to circulate'in the case of a motor operated by steam or Water serving for the lcooling of the walls of the cylinderA in case of an explosion-motor, in which f an elevation of temperature incompatible with efficient working of the apparatus tends to be produced. A

In order to prevent the motor fluid from escaping between the lateral walls of the fixed drum A andthe circular walls of the drums B and D, these drumsB and D enter recesses s t, formed in the end of the cylinder A. This baffle arrangement forces the fluid which tends to escape laterally to follow a longer path, and therefore opposes a greater resistance to its escape through the joint. The

projections c of the drum B, which constitute pistons are formed with longitudinal grooves u communicating with the lateral walls of the said projections c by means of orifices o.

It follows from this arrangement that the fluid which is within the space r enters one of the grooves u through the apertures i; and forms a joint for the whole length of the projection c.

Having now particularly described and ascertained the nature of my said invention and in what manner the sameis to be performed, I declare that what I claim is 1. In a rotary motor, the combination with the outer cylinder A, of the drum B rotatively mounted in the cylinder and provided with two oppositely-disposed pistons c, and the drum D, also rotatively mounted in a recess in the cylinder and in contact tangentially with the drum B, said drum D having a recess to receive the pistons lc, of gearing be-` tween said drums whereby the drum B drives the drum D, the continuously-rotating valves H driven from the drum D and controlling port-passages to the cylinder, said valves having diametrical ports t', and the gear for drivingsaid valves, substantially as set forth.

2. In a rotary motor, the combination with ther cylinder A, of the drum B rotatively mounted therein and provided with oppositely-disposed pistons c, and teeth d which extend the entire length of the drum within the cylinder, and the auxiliary drum D, rotatively mountedw in a recess in the cylinder and having teeth e which gear with those on the drum B,of thediametrically-ported valves H, controlling the inlet-passages of the motor, and gearing for continuously rotating said valves H, substantially as set forth. v

3. In a rotary motor, the 4combination with the cylinder A, having two 'always open eX- haust-ports, and two inlet-ports, the checkvalves o at said inlet-ports, and the continuously-rotating valves H having diametrical ports controlling said inlets, of the rotativelymounted drum B in the cylinder and provided with pistons c, the auxiliary recessed drum D mounted rotatively in a recess in the cylinder and in peripheral contact with the main drum B, and gearing between the drums B and D, whereby the former drives the latter, substantially as set forth.

In witness whereof I have hereunto signed my name, this 31st day of May, 1901, in the presence of two subscribing witnesses.

ALBERT LoUIs BECHT.

Witnesses:

ARMENGAUD, Jeune, MARCEL ARMENGAUD. 

